Metallica gets played on my local rock station all the time, and every Monday-Saturday at 9 PM they have a three-shot of Metallica that usually is Popular Song/Cover song or new song/deep cut and it's awesome.

My local rock station does that. Every weeknight at 10 they have a thing called "Mandatory Metallica". It's pretty much the same as yours, with a popular song followed by a couple deep cuts.